The Shaft,straight, cataloged under National Stock Number 3040-00-129-8638, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-129-8638 |
| Primary Part Number | 66A79B48-1 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Surface Finish | 16.0 MICROINCHES |
| FSC Application Data | LOADER ASSY |
| First End Diameter | 0.2495 INCHES NOMINAL IN |
| Second End Diameter | 0.2495 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Groove Diameter | 0.1240 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Groove Width | 0.1400 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.477 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED AND INTERNALLY THREADED |
| Material | STEEL COMP 4130 |
| Second End Internal Thread Length | 0.312 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 66A79B48-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| 66A79B48-1 | Deval Life Cycle Support Llc (USA) |
NSN 3040-00-129-8638 is a Shaft,straight, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-129-8638 has 2 manufacturer part numbers on file: 66A79B48-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), 66A79B48-1 (Deval Life Cycle Support Llc).
Key specifications for 66A79B48-1: Surface Finish: 16.0 MICROINCHES; FSC Application Data: LOADER ASSY; First End Diameter: 0.2495 INCHES NOMINAL IN; Second End Diameter: 0.2495 INCHES NOMINAL IN. 12 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.